When someone uses Gmail to open your tracked email, the default location recorded by Employee Email is a Linux-based Google Proxy in California since that is the device being used to download the images in the message.
People with administrator accounts in your organization's Google Apps (GSuite) have the ability to allowlist specific domains to bypass the Gmail Image Proxy so that you can record more accurate location metrics.
Employee Email's tracking domain is bl-1.com
To add this domain to the Image URL proxy allowlist for your organization's GSuite/Google Apps account, follow the instructions included in this article from Google's help site:
When correctly added, the domain bl-1.com is displayed in the Image URL proxy allowlist for your organization.